fix:config onGot api 与文档描叙不一致

[ranyue]

文档描叙： onGot 获取指定 key 的值，函数回调模式，若多次被赋值，回调会被多次调用 实际：第一次有值就不会再触发回调

[codecov[bot]]

Codecov Report

Base: 85.33% // Head: 85.33% // No change to project coverage :thumbsup:

Coverage data is based on head (8887646) compared to base (f3f7703). Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1638   +/-   ##
=======================================
  Coverage   85.33%   85.33%           
=======================================
  Files         196      196           
  Lines        8538     8538           
  Branches     2043     2043           
=======================================
  Hits         7286     7286           
  Misses       1170     1170           
  Partials       82       82           

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[liujuping]

分支指向 develop